Grate



Feb. 23,192 1,574,134

J. S. STOGDALE GRATE Filed Feb. 4,- 1924 2 Sheets-Sheet 1 INVENTOR 7 /4 Li @SEPH 5. 57'06DHLE Feb. 23,1926.-

J. S. STOGDALE GRATE Filed Feb. 4, 1924 2 Sheets-Sheet 2 INVENTOR JbsEPH 6. 67'06DHLE BY /w flak, TTORNEY r ch. 23, l.

l Patented -;rArENr our 1,574,134 ICE JOSEPH STOGDALEOF DUNBA'R, PENNSYLVANIA, ASSIGN OR OZFONE-I-IALF TO JAMES M. RAINE, OF RA-INELLE, VI EST VIRGIN-IA.

GBATE.

Application filed ,February 4, 1924. Serial No. 690,400.

To all whom it may concern:

Be it known-that I, Josnrrr S. S'roennnn, a citizen of the United States, and a rresident of Dunbar, Fayette County, Pennsylvania, have invented certain new and useful I1nprovements in Grates, of which the following is a specification.

This invention relates to improvements in grates, and more particularly to grates designed for use in the fire boxes f locomotives, or similar engines; the-principal object of the invention being tolprovide a grate comprising a plurality of parallel, horizontally shittable fire bars making .up its central portion with verticallyswinging grates at its ends which providesfor an'e-asy removal of clinkers and ashes.

Another objectot' the invention resides in the provision of tire bars that may be readily removed andreplaced when such is desired and which are equipped with interchangea bio and removable grate bars.

Another object or the invention resides in the provision of and details of construction of means for shifting the-slidable the bars longitudinally at ditlerent times and for moving the pivoted grates into and ,from alinement with the fire bars.

Other objects reside inthe details of construction of the various parts embodied in the invention and in their mode of operation.

In accomplishing these objects I haveprovided the improved details of construction, the preferred forms of which are illustrated in the accompanying drawings,wherein :Figure 1 is a vertical, sectional View of alocomotive lire box equipped with'a grate that is constructed in accordance with the present invention. 7

Figure 2 is a plan view of theqgrate.

Figure 3 is a side view or" one oftheoutside lire bars einbodied'in the grateshowing its actuating cam.

Figure tie a longitudinalsection ofone of the tire bars taken on the line 44 in Fig ure 2 illustrating the disposal of the removable grate bars therein.

Figure 5 is a transversesection taken on the line 5-5 in Figure 2, particularly illustrating the cam shaft and the shifting cams thereon.

Referring more in detail to the clra-wings- 1 designates what may be the fire boX of a locomotive boiler andwhich comprises opposite side sheets 2 and 3, a front flue sheet 1= the grates. Inward or outward movement 1 and a back wall 5. Supported fromthe side sheets transversely of the fire box are .two parallel grate supporting beams 6 and 7, upon which thereis slidably supported a plurality ofparallellire bars 8 which are revare mounted at each end of the fire boxand are pivotally supported by means of trunnions 13 at their ends upon brackets 14 fixed at opposite sides ofthebars rand ends of the firebox. These grates areadapted toclose the space between vthe. end walls not the lire box and the ends of the bars 8 an are mounted to swing from horizontal position .todownwardly inclinedpositions, and when in :the latter position permit the removal of clinkers and ashes from the grate into the ash box.

Each ofthe grates 12 has fingers 12 extending therefrom and these are adapted to inter-meshwith the fingersof the fire-bars,

as is shown in Figure, 2, to prevent the fire from falling through when the bars 8 are shifted toward one: end. orthe' other.

The means provided ,for imoving the pivoted grates comprises thellevers 18 that are pivotally mounted on'bracketsl) on, the outside end, at the back end of the boiler and which are connected at their lower ends with rods or links 19 that extend to and are pivotally connected with depending'lugs20 on of the upper ends of the lovers 18 causesthe A swinging movement of the grates 12, with which they are connected, to horizontal or downwardly inclined positions. Any suitable means could be. provided for holding the V levers 18 at set or adjusted positions. It is preferred to have the fingers ofthe bars 8 and grates 12 cast on blocks 20 that may be mounted in dovetailed slots 21 inthe bars, or grates, so that should the fingersbecome burned olf or broken, they could be replaced without necessitating the replacing ofthe grate or the bar.

Each of the fire bars 8 consists of an open frame whereln grate bars 25 are held in parallel relation. In the present construction, I have shown eight fire bars. However, it is to be understood tnat more or less could be used in accordance with the size of the fire box and also that the number of grate bars used would depend upon the size and character of the fire bar. Each of the fire bars in the present construction is equipped with nine grate bars that are placed end to end in three parallel rows. These are supported at their ends in inter-locked relation, as shown in Figure l, from the outer ends of the fire bars from bridge walls 2'? therein- Each grate bar is equipped near its ends with laterally extending lugs 28 which engage each other to hold the bars properly in spaced relation and they are all V-shape in crosssection so that ashes or cinders will not clog between them. I

The means which 1 have. provided for shifting the fire bars longitudinally back and'forth comprises a cam shaft mounted rotatably in brackets 36 fixed to the opposite walls of the fire box below the grate so that the shaft extends transversely beneath the ends of the bars 8. Centrally of the shaft provision is made by means of the gear 37 whereby the'shaft may be revolved from a suitable driving mechanism and keyed on the shaft 35, near its ends, a e cams 38 and 38' adapted, as the shaft revolves, to be brought into contact with lugs 39 that depend from the two outside bars of the grate to cause these to be shifted forwardly or toward the flue sheet 4-.

The intermediate grate bars are shifted forwardly after the advance of the two outside bars by means of a cross bar 40 that is fixed at its end in the two outside bars and which extends through slots '11 in the intermediate bars, as shown in Figure l; the slots being shorter in length than the distance of movement of the outside bars so that, as the cross bar 40 is carried forwardly by the movement of the two outside grate bars, it will engage with the forward ends of the slots of the intermediate bars to shift them forwardly.

There is also provided on the shaft 35, adjacent to the cams 3S- 38 another set of cams 4e8t8 that are adapted, as the shaft 35 continues to rotate, to engage with lugs 47 formedon the two outer grate bars in offset relation to the lugs 39 to shift these two outside bars rearwardly or toward the wall sheet 5. It will be stated here that the slots ll in the intermediate barsfthrough which the bar 40 extends, are so located that this rearward shifting of the two outside bars does not cause movement of the inter mediate bars.

There is also provided on the shaft 35 beneath the intermediate bars 8, cams l5 which are adapted, as the shaft continues to rotate and after the outside bars 8 have been shifted rearwardly, to engage at different times with cross members &6 on the intermediate bars to shift them rearwardly. By causing the bars to move at different times, a better sifting of the ashes is obtained.

This cam shaft may be revolved continuously or when desired, and this effects a shifting of the bars to automatically sift the ashes from the fire. WVhen clinkers or cinders are to be removed, the end grates 12 may be lowered and the cinders raked off into the ash box.

Having thus described my invention, what I claim as new therein and desire to secure by Letters-Patent, is:

1. The combination with a fire box and transversely located grate supporting beams of a grate comprising a plurality of parallel fire bars mounted on the supporting beams for longitudinal shifting, a cam shaft, cams in said shaft for shifting the two outside bars forwardly and rearwardly, means carried by the two outside bars for moving the intermediate bars forwardly after a certain amount of movement of the outside bars and means 011 the cam shaft for shifting the intermediate bars rearwardly.

2. The combination with a fire box and transversely located grate supporting beams of a grate comprising a plurality of parallel lire bars mounted on the supporting beams for longitudinal shifting, a cam shaft, came in said shaft for shifting the two outside bars forwardly and rearwardly, means caried by the two outside bars for moving the intermediate bars forwardly after a certain amount of movement of the outside bars and a series of cams on the cam shaft engageab e with'lugs of the intermediate bars to return them rearward at different times.

3. The combination with a fire boxand transversely located grate, supporting beams therein, of a grate comprising a plurality of parallel fire bars mounted on the supporting beams for longitudinal shifting, the said bars that are intermediate the two outside bars having longitudinally extending slots therein, a cross bar fixed at its ends to the two outside-fire bars and extended through said slots of the intermediate bars, a rotatable cam shaft mounted transversely beneath the bars, cam engaging means on the fire bars, cams on the cam shaft engageable with the said cam engaging means of the outside bars to move them longitudinally and to effect like movement of the intermediate bars through said cross bar, and other cams on said shaft operable to return the fire bars at different times.

Signed at Dunbar, Fayette County, Pennsylvania this 12th day of January, 1924.

JOSEPH s. sroenann. 

